Air jet for producing bulked stub yarn



June 18, 1963 A. FIELDMAN 3,093,878

AIR JET FOR PRODUCING BULKED STUB YARN Filed Oct. 16, 1961 o I Q i Q I a '4 l :I I

INVFNTOR.

ARNOLD FIELOMAN BY lbifi AT TORNEY-S United States Patent 3,093,878 AIR JET FOR PRODUCING BULKED STUB YARN Arnold Fieldman, Brooklyn, N. assignor to Carl Nuissl, Boston, Mass- Filed Oct. 16, 1961, Ser. No. 145,197 3 Claims. (Cl. 28-1) This invention is broadly in the novelty art; more spec' cally it presents a device and process for producing novelty slub or knub effect yarns.

Many and varied processes of producing a novelty effect in yarns have been attempted in the prior art. These processes are generally expensive and ineflicient and not easily adaptable to mass-production techniques.

It is a cardinal object of this invention to set forth a method and apparatus for producing novelty effects in yarns.

Another object and accomplishment of this invention is to describe a method for accomplishing the above that will be suitable for mass-production techniques.

Another purpose of this device is to set forth an apparatus for producing an improved texture yarn.

Still another purpose of this device is to produce a resilient and fiuffy knub, slub, or the like, on a yarn, as desired.

An additional purpose hereto is to provide a method of bulking, texturizing or opening up yarns.

With these objects in view, the invention consists of the novel features of construction and arrangement of parts which will appear in the following specification and recited in the appended claims, reference being had to the accompanying drawings in which the same reference numerals indicate the same parts throughout the various figures and in which:

FIG} I is an elevational view partly in section illustrating'one substantially complete apparatus for carrying outone embodiment of this invention, with an alternate embodiment shown in phantom.

FIG. 2 is an elevational view taken substantially along line 2-4 of FIG. 1,

FIG. 3 is a greatly enlarged view of one embodiment of the finished yarn of this invention illustrated with slubs or knubs thereon.

Referring to the drawings which illustrate what may be for'some purposes a preferred embodiment of the invention, there is illustrated generally a roll of a V multi-filament yarn 11.

It will be noted that the filament yarns, such as regenerated cellulose, nylon,

It will be noted that in the embodiment illustrated, the rollllt) of yarn 11 is illustrated as being mounted on a bobbin 16 for free rotation and unwinding. A light tensiong member may be provided but will generally not be necessary or desirable.

Spaced immediately ahead of the air jet nozzle will be a hollow turbulence chamber 18. As will be seen, the said hollow turbulence chamber 18 will be rigidly inafter, the angle iron bracket 19 '11 have an elongated slot 20 to which its fastening bolt 21 passes so that the longitudinal distance between the turbulence chamber 18 and the air jet nozzle 15 may be varied, if desired.

The turbulence chamber 18 illustrated herein, is shown as substantially a truncated cone with the smaller base being filled in. The said chamber 18, however, may assume any well known geometric shape, such as cylindrical, etc. It has been found that by varying the shape of the chamber 18, the particular novelty effect produced in the finished yarn may be varied somewhat.

In proximity to the chamber 18 will be the air jet nozzle 15 shown in section in FIG. I and in side elevation in FIG. 2. The air jet nozzle 15 is illustrated as having a substantially circular outer shell 30 held in position by a bracket 31. The ends of the shell 30 are substantially covered by flat end plates 34 and 35. The juncture between the end plates 34 and 35 and shell 30 will be air tight and leakproof. A suitable gasket may be provided for this purpose.

The shell 30 will be continuous except for one or more openings 36 to receive a connection with a hose 38 for air or the like under pressure.

Centrally contained within the shell 30 and fastened to the end plates 34 and 35 will be an air jet member 40. The member 40 will be rigidly held in position as by bolts 41 through Additionally, the end plates 34 and 35 may be suitably recessed to position the said member 40. Passing longitudinally through the center of the member 40 and through the end plate 34 and 35 will be a cylindrical opening 50 of somewhat larger dimension than the yarn 11.

Additionally, a plurality of relatively small passages 51 will be spaced about the member 40 connecting the center opening 50 to the outer portion of the said member. The openings 51 will be at an extremely sharp angle so that the centermost point thereof will be closer to the chamber 18 than the outermost point thereof.

At the side of the air jet nozzle 15 opposite the chamber 18, and spaced some distance therefrom, will be a take-up device 60. The said take-up device may be driven as by a motor 61 or the like and will wind the finished yarn 62 uniformly on a reel 64.

The operation of this embodiment may now be explained.

As previously mentioned, the yarn 11 will be fed from reel 10 laterally upward to the chamber 18. Air under high pressure will be fed through hose 38 to the central portion of the shell 30. The air, continuing under high pressure and now at high velocity, will conof the invention It will be realized that the air flowing within the said causing the fibers to This has been found to produce slubs or knubs 7t] thereon. Simultaneously, however, the take-up reel 64 will be turning. causing the yarn 62 now with slubs 70 thereon, to pass through the center opening 50 of the air jet nozzle 15. The air flowing through the opening 50 about the yarn 61 will cause further separation and bulking of the said yarn.

The finished novelty slub yarn 62 will then be wound on the take-up reel 64 for weaving or other uses.

the pressure of the incoming air, varying the width of the openings 51 and 50, varying the take-up speed, varying the spaced distance between the chamber 18 and air jet nozzle 15, varying the shape of the chamber 18, etc.

It has been found that somewhat improved results may be obtained under certain circumstances by moving the chamber 18 against the plate 35. The yarn 11 will then be fed into the chamber 18 through a suitable opening in the Walls thereof. The air exiting from the air jet nozzle 15 may escape from the chamber 18 through the same opening.

Additionally, a resin material may be sprayed within the chamber 18 to produce a special novelty effect. For the same purpose, the chamber 18, or the air entering therewithin, may be heated.

Illustrated in phantom in FIG. 1 is a portion of an additional feature of the invention. A carrier yarn 100, under tension, is fed into the chamber 18 along with the yarn 11 to be bulked. In that the yarn 100 is under tension, it cannot bulk, but will act as a carrier for the bulk yarn 11. Thus, a combination yarn is obtained and almost any characteristics may be imparted thereto.

Furthermore, it has been noted that in addition to slubs or knubs, other novelty effects may be obtained such as pigtail yarns, etc. merely by varying the quantity, in tensity and duration of incoming air.

While there are above disclosed but a limited number of embodiments of the structure and product of the invention herein presented, it is possible to produce still other embodiments without departing from the inventive concept herein dis-closed, and it is desired, therefore, that only such limitations be imposed on the appended claims as are stated therein, or required by the prior art.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is:

1. An apparatus for prising:

(a) means to free said yarn to a turbulence chamber under a relatively light tension,

(b) a nozzle directing a fluid into said turbulence chamber against said yarn,

(0) means to withdraw said yarn from said turbulence providing slubs in a yarn comchamber through said nozzle in a direction opposite to said (d) and take-up means rate substantially less to feed.

fluid,

for said yarn advancing at a than the rate of said means 2. An apparatus for providing slubs in a yarn, concomprising:

(a) means to freely feed said yarn to a turbulence chamber under a. relatively light tension,

(b) a nozzle directing a fluid under varying pressure into said turbulence chamber against said yarn,

(c) means to withdraw said yarn chamber through a nozzle in a from said turbulence direction opposite to (d) and take-up means for said yarn advancing at a rate substantially less than the rate of said means to feed.

3. An apparatus for converting a filament yarn into a novelty yarn,

comprising:

(a) an apertured turbulence chamber,

(b) feed means to conduct said filament yarn into said turbulence chamber through said aperture under relatively low tension,

(0) a nozzle to direct a fluid medium under pressure in said turbulence chamber in alignment with said nozzle, said take-up means being arranged to withdraw said yarn under relatively high tension from said tur bulence chamber through said nozzle.

References Cited in the file of this patent UNITED STATES PATENTS Cook et al. May 29, 1962 

1. AN APPARATUS FOR PROVIDING SLUBS IN A YARN COMPRISING: (A) MEANS TO FREE SAID YARN TO A TURBULENCE CHAMBER UNDER A RELATIVELY LIGHT TENSION, (B) A NOZZLE DIRECTING A FLUID INTO SAID TURBULENCE CHAMBER AGAINST SAID YARN, (C) MEANS TO WITHDRAW SAID YARN FROM SAID TURBULENCE CHAMBER THROUGH SAID NOZZLE IN A DIRECTION OPPOSITE TO SAID FLUID, (D) AND TAKE-UP MEANS FOR SAID YARN ADVANCING AT A RATE SUBSTANTIALLY LESS THAN THE RATE OF SAID MEANS TO FEED. 